Dry-pipe valve



April 12 1927 T. w. cAL-JDLE DRYl PIPE VALVE 2 Sheets-Sheet l Filed Sept. 10, 1923 @ttor 11u10 T. w.` cAuDLE DRY PIPE VALVE.

April l2 1927. .1,624,315

Filed Sept. 10, 1923 2 Sheets-Sheet 2 Twan/faz@ :ummm

Patented pr. 12, 1927. UNITED STATES PATENT THOMAS W. CAUDLE, OF DAYTON, TENNESSEE.

DRY-PIPE VALVE.

Application led September 10, 1923. Serial No. 661,922.

This invention relates to a dry valve for end 12 of the trigger with the body portion use in automatic sprinkler systems, the. 10 thereof and is designed for lengthening valve being so constructed and mounted and shortening the trigger for a purpose that the water pressure in the main will presently to be described n 6U 5 be held against the air pressure in the The chambers 8 and 9 have openings` in sprinkler system until the air pressure is their side walls provided with hinged cloreleased by the opening of a head in the sures 13 and 14 with gaskets 15 surroundsprinkler system. ing the openings which they close. These The object of invention is to provide a doors 13 and 111 have flanges 16 overlying 65 l device having a dry and a wet valve with the outer face of the casing and provided a trigger arranged between them and dewith bolts l? for securing the. closures in signed to hold the water pressure from befluid-tight engagement with the casing. low against the air pressure on the top A priming pipe 18 extends from the lowvalve. er end of the casing below valve 7 to a 70 l With the foregoing and other objects in point near the center of the casing opening view which will appear as the description through the casing` by means of a branch proceeds, the invention resides in the compipe 19 just above the top valve 6 .vhiie bination and arrangement of parts and in a gage 20 entends to the top of the casing the details of construction hereinafter deso that it may be easily ascertained when 75 20 scribed and. claimed, it being understood the proper amount of priming water is conthat changes in the precise embodiment of tained in the 4chamber '8. A drain opening the invention herein disclosed7 may be made 21 is provided at the lower end of the caswithin the scope of what is claimed withing so that the system may be drained after out departing from the. spirit of the inventhe valve has been tripped and filled with 80 tion. water.

In the accompanying drawings z- The casing 1 is provided in its rear walls Figure 1 represents a front elevation of between valves 6 and 7 with an opening 22 a valve embodying this invention. with which is designed to be connected a 2 is a side elevation thereof. small water motor, not shown, which is set 85 Fig. 8 is a central vertical section. in motion and turns an alarm when the sys- Fig. 11 is a horizontal section taken on the tem is filled with water. line ei-el of Fig. 1; and An angle valve 23 is located in pipe 18 for Fig. 5 is a bottom plan view of the upcontrolling the passage of water through the per valve detached. pipe 18. oo The. valve embodying this invention com- The vtop valve 6 is provided on its lower prises a shell-like casing 1 having annular face with a rack 24 extending transversely apertured flanges 2 and 3 for connection rethereacross and with which the pointed end spectfully with the sprinkler system and 12 of the trigger 10 is designed to be engaged the ivater main. in a manner presently to be described. U5 Valve seats 4 and 5 are located in the in the use of this device the casing with casing 1 and are preferably constructed of the two valves located one above the other brass and have threaded engagement with is inserted between thesprinkler system and the casing. Designed to engage these seats the water main and connected to them with 4 and 5 are two valves 6 and 7 pivotally fluid-tight joints. loo connected to one side wall of the casing rEhe chamberSis designed to contain from and which are preferably equipped with eight to ten inches of water which rests on bronze or composition interchangeable seats the valve 6 before air is pumped into the ground to a perfect surface to insure a tight sprinkler system. After the system has been joint. rfhese valves open in the same dipumped full of air to a pressure of from 105 rection and form in the casing 1 chambers twenty-five to thirty pounds the trigger 10 8 and 9 for a purpose presently to be deis set rigid against the upper valve 6 and scribed. tightened by means of the turn buckle 11 so A trigger 10 is pivoted to the toe of the that a perfectly tight joint between the valve lower valve 7 and its free end engages the 7 and its sea't will be formed. After the 110 heel near the hinge of the top valve 6. A par s have been so arranged water from turn buckle 11 connects the pointed free the main is turned on and exerts its pressure against valve 7 ready to open said valve when the air pressure in the system is reduced which occurs When the heat from a ire releases a sprinkler head. lt is of course `understood that the air pressure in this instance holds Valve 6 seated against the pressure exerted by the trigger l0 from Valve 7 and immediately the air pressure is released the valve 6 will open and permit valve 7 to also open under the pressure of the Wirte! in the niain thus admitting the water to the system which will pass out through the sprinkler on to the surrounding area and thus extinguish the fire.

Viter the lire has been extinguished the Water from the main is cut ofi', the casing drained out in the man-er above described and the valves set reaiiy for the nextfire.

Various Changes in the form, shape, proportion and other minor details oi' construction may be made without departing from the principle or sacrificing any of the advantages of the claimed invention.

A valve of the class described comprising a easing, superimposed valve seats Wit-hin the casing, valves adapted to engage the valve seats to cut oil' the passage of fluid through the casing, said Valve members being arranged one above the other, the upper valve member having a rack formed along its under surface, an adjustable latch member carried by the lower Valve member and adapted to engage the rack to adjustably connect the Valve members, and said valve members adapted to more to their open positions by Water pressure directed to the under sur face ot the lower valve member.

ln testimony that l claim the foregoing as my own, l have hereto aixed my signature.

THOMAS W. CUDLE, 

